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Dr. Sarah Donald
Dr. Sarah Donald Clinical Lead

"Our medical team is always on hand to ensure that you get the safest and most effective treatment. Your medication will be dispatched the same day from our pharmacy."

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Metronidazole FAQs

What is Metronidazole?

Metronidazole is known as a 'nitroimidazole antibiotic' that is used to treat a number of bacterial infections, especially bacterial vaginosis (also known as gardnerella vaginalis) and trichomonas vaginalis.

By combating the production of the harmful bacteria that is causing the symptoms, Metronidazole works quickly helping to remove the infection with 2-3 days of use.

What are the benefits of Metronidazole?

One course of Metronidazole 400mg can completely cure vaginal infections such as bacterial vaginosis and trichomonas vaginalis. The sooner these conditions are treated, the less effect they will have on your overall health. The vast majority of women respond very well to Metronidazole and only a short course is needed to clear the infection. It can also provide secondary benefits such as being an effective secondary treatment for:

  • Helicobacter pylori infection (also known as H. pylori) which causes stomach ulcers
  • Gum infections
  • Parasitic diseases such as amoebiasis

How does Metronidazole work?

Metronidazole affects the bacteria's ability to spread, which firstly helps to reduce any discomfort the symptoms may be causing within a few days. The treatment permeates individual protozoa cells interfering with the cell DNA, this action prevents the bacteria from duplicating so that it cannot spread and begins to die. This will help your body's defences to cope better with the bacteria and complement the antibiotic actions to completely remove it from your system.

How do I use Metronidazole 400mg tablets?

The dose and how often you take Metronidazole will depend on severity of the infection and what caused it. It is always important that you finish a course of antibiotics even if the infection appears to have cleared or you start to feel better. When taking this medication to treat bacterial vaginosis (BV):

  • Take one 400mg tablet should be taken twice a day over a 7 day period
  • You should preferably take the tablet during or after a meal
  • It should be swallowed whole with water, not chewed or broken

It is also not advised to consume any alcohol for the entire duration of your course, and for at least 48 hours afterwards as drinking whilst using Metronidazole can induce unwanted side effects. To make sure that you are completely rid of the infection, you are recommended to have a health check-up or take a test 2 weeks after completing your treatment.

At HealthExpress, we offer Metronidazole in a 400mg tablet dosage which is ideal dose that is recommended by doctors that has been proven to be well-tolerated.

What if I miss a dose?

Just take your missed tablet as soon as you remember and continue the treatment as normal.

If it is almost time to take your next tablet, miss it out completely and never take two tablets to make up for it. If you have, keep a watchful eye on your health and seek further medical attention if you are feeling unwell.

What are the side effects of Metronidazole?

Although side effects are not too common, they can occur when taking prescription medicine such as Metronidazole. It is still essential that you familiarise yourself and take precautions if you are particularly sensitive to any of the ingredients.

Some of the most common side effects are:

  • Diarrhoea
  • Constipation
  • Nausea
  • Vomiting or abdominal pain
  • Unpleasant taste in the mouth
  • Loss of appetite

Rare side effects include:

  • Drowsiness
  • Headache.
  • Double vision
  • Joint pain
  • Jaundice
  • Skin rash or skin problems

Fortunately, these are not common and if they do occur, should lessen as the body becomes used to the treatment. If you do find any symptoms becoming severe or worsen, please ensure you speak to your doctor as soon as possible. You can also read the attached patient information leaflet for a full list of associate side effects.

What interactions/precautions should I be aware of when using Metronidazole?

Women over the age of 18 can buy Metronidazole 400mg tablets to treat bacterial vaginosis and both men and women can order the treatment to treat trichomonas, however certain groups should exercise caution. You may not be suitable to use this if you:

  • have liver disease
  • have a stomach or intestinal disease
  • have blood cell disorders such as anaemia or leucopoenia,
  • have epilepsy or nerve disorders.
  • have an allergic reaction to Metronidazole tablets or its active ingredients

Although there have been no conclusive studies to show that Metronidazole is not suitable for use during pregnancy, it is also not possible to say what effects it may have on the unborn foetus. It is essential to consider the benefits and risks before deciding to use this treatment whilst pregnant or when breastfeeding.

It is recommended that those with Crohn's disease should avoid the use of Metronidazole as certain studies have shown a possible increase in the likelihood of colon of breast cancer. However, the likelihood of gastrointestinal cancers is only increased in the long term use of Metronidazole.

Metronidazole tablets can sometimes affect or be affected by other medications; however there have been no known interactions when it comes to taking paracetamol. Make sure that you mention in your consultation if you are taking lithium, medicines for the treatment of epilepsy, medicines to stop blood clotting (anti-coagulants), disulfiram, ciclosporin, oral contraceptives, cimetidine or fluorouracil.

How can I buy Metronidazole online?

You can safely buy Metronidazole tablets online to treat bacterial vaginosis or trichomonas vaginalis after completing an online consultation. When approved, your order can then be completed and a prescription will be issued to our registered pharmacy. The course of tablets are then packaged and delivered the next day across the UK.

Can I buy Metronidazole without a prescription?

Metronidazole is a prescription only medication that must be approved for you to use to ensure your health isn't at risk. This includes buying online or in-person. Metronidazole can cause side effects in a minority of users. If the tablets affect an underlining heart condition, in particular, it's important to disclose this to the doctor as well as your medical history.

Is it safe to buy Metronidazole online?

We can guarantee that the medication purchased on HealthExpress is genuine prescription drugs that require a consultation reviewed by a doctor registered in the UK. Our doctor individually reviews every consultation to ensure the medication, quantity, and dosage is safe for you to use. Metronidazole is prepared by our UK based pharmacy where it is checked again before being securely dispatched.

If Metronidazole has been refused for you, you will be given the details as to why and you will not be issued a prescription.

Our service at HealthExpress has all the relevant and mandatory safety certificates including the Medicines & Healthcare Products Regulatory Agency (MHRA), General Medical Council (GMC) and the General Pharmaceutical Council (GPC).

Getting Metronidazole delivered in the UK

Delivery of Metronidazole at HealthExpress UK is by Royal Mail or private courier. Our next-day delivery is free of charge and will arrive at your chosen address the next day. This is on all orders completed and approved by our doctor by 4:30pm Monday through to Friday. This means we deliver on Saturdays. This service is across the UK.

We also offer a nominated day delivery meaning you're in control of when and where your medication is sent.

We have UPS Pick-up Points if you'd prefer collecting from a local shop in-person.


How do you pay for Metronidazole?

At HealthExpress, you can pay using any major credit cards including VISA and MasterCard. When selecting this in the checkout, we will send our details.

At this time, we do not offer the options of payment via cash on delivery or American Express.

How do I know if it's authentic Metronidazole?

Metronidazole will come in genuine packaging including blister packs for the tablets. Every medication will come complete with the patient leaflet, which must be thoroughly read before use. At HealthExpress, our process includes checks from our doctor as well as the UK registered pharmacy to ensure authenticity of Metronidazole. If you are unsure in any way, you can contact our Customer Service for further validation, or check our safety certificate present on the home page on this website.

Is my personal and medical information safe online?

When buying Metronidazole online, a consultation must be provided and this must be reviewed by a UK certified doctor. This means providing your complete medical history and personal details in our online consultation. All data on HealthExpress is encrypted via Norton Secured and will not be shared with third parties.

Do you have any other queries or observations?

If you have any further questions regarding Metronidazole that we haven't answered here, you can always contact our Customer Service Team via email, phone or Live Chat available Monday to Friday 8am-5.30pm.

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